package com.jia.explore.genal.list;

public class Pro04 {
	public ListNode mergeTwoLists(ListNode l1, ListNode l2) {
        ListNode dummy = new ListNode(-1    );
        ListNode cur =dummy;
        while(l1!= null && l2!= null) {
            if(l1.val < l2.val) {
                cur.next = l1;
                l1 = l1.next;
            }else {
                cur.next =l2;
                l2 = l2.next;
            }
            cur= cur.next;
        }
        if(l1!= null) 
            cur.next = l1;
        if(l2 != null)
            cur.next = l2;
        return dummy.next;
    }
}
